Question

A solution of ammonia NH3(aq) is at equilibrium. How would the equilibrium
change if NH4* were removed from the solution?
OA. [NH4*] would increase.
OB. [H*] would increase.
C. [NH] would decrease.
OD. [NH3] would increase.

Answer 1

Let's check the equation

$\sf NH_3+H^+\leftrightharpoons NH_4^+H_2O$

As per Le ch a.tlers principle

• Any external factor affecting the concentration or temperature still change the equilibrium

So

If we remove NH_4+

Water would increase

• NH_3 would decrease

Option C

Answer 2

As per Le Ch.attlers Principle

• If we change the concentration of Reactants it changes the concentration of products and vice versa

As we are decreasing NH4+ NH3 would decrease

Option C